Tool



Jan. 23, 1951 W. A. BARN ES TOOL 2 Shee'cs--Sheefl l Filed May 2l, 1945gig/- 2 INVENTOR.

MM5 MMF Jan. 23, 1951 w. A. BARNES 'rooL 2 sheets-sheet 2 Filed May 2l,1945 IN V EN TOR.

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27' .5 M 1x7 Wm Patented Jan. 23, 1951 `TOOL William A. `Barnes,xUtica,N.`Y.,.assignor to 'Utica .Drop .Forge & TooliCorporation, a corporationof New York Application May 21, 1945 Serial No. 595,009

'3 Claims.

' My :invention relates in general 'tohand operated tools and moreparticularly to hand operated tools having -a mechanism for producing arelae Itively large working force for a relatively small amount ofpressure applied to the handles of the tools.`

An object'of my invention is the provision in aihand operated tool ofavmechanism yfor producing a -relatively'large working force for aArelatively small amount of pressure applied Ito `the vhandles ofthetool.

Another object o1 `my invention :is Vthe `pro- 'vision :in a hand'operated -tool of a lever mechanism 'which produces V-a largemechanical advantage for applying a relatively large working force tothejaws of 'thetool Another lobject `of rmy invention is 'the :provision of`mounting Vthe lever mechanism substantially. Within the'handles of thetool whereby externally projecting lparts are eliminated.

Another object of my invention is wthe provision of employing the Shanksof one of .the jaws of the tool as a reaction element against which thelever mechanism operates for apply ing a working force to the other jawof the. tool.

Other objects and a fuller Aunderstanding .of my invention may behad'byreferring tothe folt lowing description and claims, taken invconjunction With the accompanying drawing, in which-t Figure 1 is aside elevational view of a lhand ltool embodying the features of myinvention;

Figure 2 Vis an end view Vof the tool shown .in Figure 1;

'Figure 3 is a cross-sectional view 4taken along the line 3-3 'of Figurel;

Figure 4 Vis `a diagrammatic view illustrating my hand'tool'wth the'handles shown in the open position;

` Figure 5 is a modiiied form rof a-'tool'having the lever mechanismapplied to but one side of the tool; and

Figure 6 is a diagrammatic vview `of Figure 5 Showing the handles intheir open position.

`Wth particular reference to Figure 1 of Vthe drawing, ,my hand operatedtoolcomprises two laws I ,ligand I I adapted to be operatedby handles22,:,and' ,23, The jaws, as illustrated, are provdedgrespectively withrecesses I2 fand )Shaving cutting edges `adapted to cut cable or 'anyother :element of likenature. It is to'be clearly understood that thejaws of my hand operated `tool maybe oir any particular type andare 'notlimited totlie ',typegshown which may 'be used for cutting 'a'zcable-or'other 'like element'. A*The jaws HI vand f1 I0 :by `means of pivotmeans .23.

I vvI have 'shanks I5 and I6 respectively, and are pivotally connectedtogether in a crossepivotal relationship lby means of a main pivotalconnection I4. The shanksa'nd the jaws are of one integral-piece wherebywhen the Shanks are operated the jaws yare likewise operated. The jaw I0and its respective integrally connected `shank is substantiallysimilarto the jaw II and its Vintegrally connected shank. As illustrated, thejaw Ii) and :its respective shank is provided with a sideportion ll andthe jaw `II with its respective shank is l.provided with a side portion18. The handle 22 has its pivotally mounted end 24 pivotally connected.to the side portion 5110i Athe Similarly, the handle23 has itspivotally mounted-end 25 `pivotally connected to the side portion .i8 of.the jaw II by means of pivot means 2l. Accordingly, the two handles 22and 23 are connected respectively to the `iaws I0 and .Il The lower endof the shank i5 is .connected to the handle 23 by means of a link 29.The `lower end of the vlink 29 is connected to Athe ,lower .end of theshank I5 by means of apivot v3l and the upper end of lthellink isconnected to the 'handle 23 `byrreans of a Ipivot 3,3. Similarly, thelower end of the shank I6 is connected to the handle 22 'by means oi a'link 28. The lower end of the link 23 is connected to the lower end ofthe shank I5 by means of a pivot Sil and the upper end of the link 28 isconnected to the handle 22 by means of a pivot 32. The pivotpins 26 and32 are reinforced by re* inforcement links 34 mounted within the handle22, Similarly, the pivot means 2l .and 3.3 are re: inforced byreinforcement links 34 mounted within the handle 23.

When the handle '22, Afor example, is movedinwardly the `pivot `means.32 moves towards a straight line drawn `between the pivot means ,'25and'3. Therefore, a large force is exerted 'at the pivot means 2S in thedirection of the illustrated arrow. A force in the direction of theillustrated arrow .rotates the cutting jaw in a .counter-clock-.mechanicaladvantage vof fthe linkage mehlim Accordingly, the levermechanism produces a relatively large working force on the jaws for arelatively small amount of pressure applied to the handles. The shanksof the jaws are employed as reaction elements against which the levermechanisms respectively exert forces for rotating the jaws. The Figure 4illustrates diagrammatically the position of the linkage mechanism whenthe handles are spread apart. The distance between the pivot means 32and the pivot means 26 is less than the distance between the pivot means30 and 25. Similarly, the distance between the pivot means 33 and 2 isless than the distance between the pivot means 3| and 2l.

In Figures and 6 I show a modified form of my tool in that the levermechanism is applied to but one side of the tool. In this embodiment ofthe invention a handle 36 is connected integrally with the shank I5 andthe jaw Il. As the handles 23 and 36 are moved relative to each other,the lever mechanism produces a mechanical advantage for moving the jawsrelative to each other whereby a strong working force may be applied tothe jaws for a relatively small pressure applied to the handles 23 and36. The Figure 6 shows diagrammatically the position of the linkagemechanism when the handles are spread to their open position.

In my invention, it is to be noted that the shank which is attached toone of the jaws is employed las a reaction element against which thelever mechanism exerts a force for rotating the other jaw. It isfurthermore observed that the linkage mechanism is disposed within thehandles which are channel shaped with the result that there are noexternally projecting parts which interfere with the ease of handlingthe tool.

Although I have described my invention with a certain degree ofparticularity, it is understood that the present disclosure has beenmade only by Way of example and that numerous changes in the details ofconstruction and the combination and arrangement of parts may berestorted to without departing from the spirit and the scope of theinvention as hereinafter claimed.

What is claimed is:

1. A tool comprising first and second working jaws having first andsecond Shanks integrally connected respectively thereto, main pivotalconnection means for pivotally connecting said jaws with said shanks incross-pivotal relation with respect to each other, a first handleadapted to pivot said first shank and jaw about said main pivotalconnection means, said first jaw having a side portion provided with apivot opening, a second handle comprising a channel member and having apivotally mounted end, said channel member having side Walls adapted tostraddle said side portion of the first jaw, actuating pivotalconnection means mounted in said side walls and extending through saidfirst pivot opening for connecting the pivotally mounted end of the sec`ond handle to the side portion of the said first jaw at a pivot pointspaced from said main pivotal connection means, link means having afirst end provided with a first pivot holearid disposed within thechannel member of said second handle,

` said link means having a second end adapted to be pivotally connectedto the end of the second shank, first pivot means mounted in said sidewalls and extending through said first pivot hole for connecting thefirst end of said link means to said "second'handle, `and second pivotmeans for connecting the second end of said link means to the end of thesecond shank, a line extending from the actuating pivotal connectionmeans to the first pivot means and a line from the rst pivot means tothe second pivot means defining an included obtuse angle at al1positions of said second handle means.

2. A tool comprising first and second working jaws having first andsecond Shanks integrally connected respectively thereto, main pivotalconnection means for pivotally connecting said jaws with said shanks incross-pivotal relation with respect to each other, a first handleadapted to pivot said first shank and jaw about said main pivotalconnection means, said first jaw having a side portion provided with apivot opening, a second handle comprising a channel member and having apivotally mounted end, said channel member having side walls adapted tostraddle said side portion of the first jaw, actuating pivotalconnection means mounted in said side walls and extending through saidfirst pivot opening for connecting the pivotally mounted end of thesecond handle to the side portion of the said first jaw at a pivot pointspaced from said main pivotal connection means, link means having afirst end provided with a first pivot hole and disposed within thechannel member of said second handle, said link means having a secondend adapted to be pivotally connected to the end of the second shank,first pivot means mounted in said side walls and extending through saidfirst pivot hole for connecting the first end of said link means to saidsecond handle, second pivot means for connecting the second end of saidlink means to the end of the second shank, a line extending from theactuating pivotal connection means to the first pivot means and a linefrom the first pivot means to the second pivot means defining anincluded obtuse angle at all positions of said second handle means, anda reinforcing member in said channel for mechanically interconnectingthe actuating pivotal connection means and the first pivot means.

3. A tool comprising a pair of working jaws having first and secondshanks respectively, main pivotal connection means for pivotallyconnectingsaid jaws with said Shanks in cross-pivotal relation withrespect to each other, said first jaw having a side portion providedwith a first pivot opening, said second jaw having a side portionprovided with a second pivot opening, a first handle comprising achannel member and having a pivotally mounted end, a second handlecomprising a channel member having a pivotally mounted end, said channelmembers each having side walls adapted to respectively straddle the saidside portions of the first and second jaw members, respectively, firstactuating pivotal connection means mounted in said side walls of saidfirst handle and extending through said first pivot opening forconnecting the pivotally mounted end of the first handle to the sideportion of the first jaw at a pivot point spaced from said main piv-`otal connection means, second actuating pivotal connectionmeans mountedin the side walls of 5 in the side Walls of the rst handleand extendingthrough said rst pivot hole for connecting the first end of the firstlink means to said first handle, second pivot means for connecting thesecond end of the iirst link means to the end of the second shank, aline extending from the rst actuating pivotal connection means to therst pivot means and a line from the rst pivot means to the second pivotmeans dening an included obtuse angle at all positions of said firsthandle means, second link means having a rst end provided with a thirdpivot hole and disposed within the channel member of the second handle,said second link means having a second end adapted to be pvotallyconnected to the end of the rst shank, third pivot means mounted in theside Walls of the second handle and extending through the third pivothole for connecting the rst end of the second link means to said handle,and

fourth pivot means for connecting the second end of the second linkmeans to the end of the rst shank, a line extending from the secondactuating pivotal connection means to the third pivot means and a linefrom the third pivot means to the fourth pivot means defining anincluded obtuse angle at all positions of said second handle means.

WILLIAM A. BARNES.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Nam-e Date 635,417 Bernard Oct. 24, 1899955,287 Schofield Apr. 19, 1910 1,299,100 Anderson Apr. 1, 1919 PatentNo. 2,539,294

Certificate of Correction January 23, 1951 WILLIAM A. BARNES It ishereby certified that error appears in the printed specication of abovenumbered patent requiring correction as follows:

Column 5, line 19, after the Word said insert second;

and that the said Letters Patent should be read as corrected above, sothat the same may conform to the record of the case in the Patent Oice.

Signed and sealed this 27th day of March, A. D. 1951.

fsw]

THOMAS F. MURPHY,

Assistant Commissioner of Patents.

